*{
    margin: 0;
    padding: 0;
}
body{
    min-width: 1903px;
    max-width: 1903px;
    margin: 0 auto;
    background-color: #faf7f7;
}
/* 头部 */
header{
    width: 100%;
    height: auto;
    padding: 20px 0;
    background: linear-gradient( rgb(184, 180, 181) 0%, rgb(184, 180, 181) 50%, transparent 100%);
}